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Abstract
Photorefractive properties of congruent LiNbO3 crystals codoped with HfO2 and Fe2O3 have been investigated at 488nm wavelength by holographic recording experiments. The results definitely show that when the HfO2 concentration is lower than its threshold concentration (4mol.%), the photorefractive properties of Hf:Fe:LiNbO3 crystals are reduced with the increase of the HfO2 concentration. However, when the HfO2 concentration exceeds its threshold concentration, the photorefractive properties of the crystal return to enhance. This unusual behavior with various HfO2 concentrations is explained. Fe2+ ions are suggested to be the main contributor to the photoconductivity of the crystal and subsequently to induce the dissimilar photorefractive properties.
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Schedule a callMore From: Optik - International Journal for Light and Electron Optics
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